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Philco 40-120C Restoration
morzh
Odobenus rosmarus
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Posts: 16,296
Threads: 567
Joined: Oct 2011
City: Jackson State, Province, Country: NJ
#21

02-18-2025, 07:09 PM
Change the tube. Check the tube's bias network.
Are any other tubes experience the drop or just this?`
Is resistor 23 OK?

It is either the tube is bad, or the 220K is not 220K, or your grid bias is too large, or your cap #25 is leaking, or the wires from 220K to the tube are bad (connection). Or your socket is dirty.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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Messages In This Thread
Philco 40-120C Filament Wiring - by bluecap - 02-13-2025, 11:28 AM
RE: Philco 40-120C Restoration - by klondike98 - 02-17-2025, 09:36 PM
RE: Philco 40-120C Restoration - by radiorich - 02-18-2025, 09:41 AM
RE: Philco 40-120C Restoration - by David - 02-18-2025, 02:48 PM
RE: Philco 40-120C Restoration - by MrFixr55 - 02-18-2025, 03:26 PM
RE: Philco 40-120C Restoration - by bluecap - 02-18-2025, 05:21 PM
RE: Philco 40-120C Restoration - by morzh - 02-18-2025, 07:09 PM
RE: Philco 40-120C Restoration - by bluecap - 02-18-2025, 07:58 PM
RE: Philco 40-120C Filament Wiring - by morzh - 02-14-2025, 10:55 PM
RE: Philco 40-120C Filament Wiring - by bluecap - 02-15-2025, 11:01 AM
RE: Philco 40-120C Filament Wiring - by morzh - 02-15-2025, 12:36 PM
RE: Philco 40-120C Filament Wiring - by bluecap - 02-15-2025, 04:29 PM
RE: Philco 40-120C Filament Wiring - by bluecap - 02-15-2025, 04:33 PM
RE: Philco 40-120C Filament Wiring - by morzh - 02-15-2025, 04:53 PM
Philco 40-120C Weak, Distorted Ouput - by bluecap - 02-17-2025, 05:49 PM



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